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Shock absorber boot, Rear. Porsche 955 Cayenne / 957 Cayenne
- Porsche 955 Cayenne 3.2L V6 2003-06
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06
- Porsche 955 Cayenne Turbo S 4.5L 2006>>
- Porsche 957 Cayenne 3.0L Diesel 2007-10
- Porsche 957 Cayenne 3.6L 2007-10
- Porsche 957 Cayenne S / GTS 4.8L 2007-10
- Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10

Fits:
Porsche 955 Cayenne 2003-06 (I1BA)
Porsche 957 Cayenne 2007-10 (I1BA/I1BW/I1BH)
I1BA - for cars with Standard Suspension
I1BW - for cars with Comfort Suspension (steel spring)
I1BH - for cars with 2 PASM Standard Suspension
Click 'Zoom in' for large parts diagram.
Diagram ref no 8
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95534350500
The product you are viewing cross references to these numbers
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche 997 MKII Turbo 2010-13
This OE Match front shock absorber additional spring is a replacement suspension bump stop / auxiliary spring component for Porsche 997.1 and 997.2 models. It is designed to match the original-style fitment and function, helping support the front shock absorber assembly and protect suspension travel.
Sold individually, 2 required - fits left or right suspension strut
Fits:

Cars with standard chassis (Option code: I029) & PASM (Option code: I475)
Porsche 997.1 C2 / C2S 2005 - 2008
Porsche 997.1 C4 / C4S 2005 - 2008
Porsche 997.2 C2 / C2S 2009 - 2012
Porsche 997.2 C4 / C4S 2009 - 2012
Porsche 997.1 Turbo 2007 - 2009
Porsche 997.2 Turbo 2010 - 2013
Diagram ref no 9
The shock absorber additional spring works with the front suspension strut assembly to help support suspension travel and damping control. It assists the shock absorber during compression and helps protect suspension components from excessive movement or harsh bottoming under load.
Functions
• Replaces the front shock absorber additional spring
• Fits left or right front shock absorber assembly
• Helps support suspension compression control
• Assists the shock absorber during suspension travel
• Helps reduce harsh bottoming and impact loads
• Replaces worn, split, compressed, damaged, or missing original springs
• OE Match replacement for Porsche 997 front suspension repair.
Why Replace This Part?
Shock absorber additional springs can wear, compress, split, deteriorate, or become damaged due to age, road impact, suspension load, heat, and moisture. A worn or missing additional spring can reduce suspension control, cause harsh ride quality, increase noise over bumps, or place extra stress on related suspension components. Replacing it helps restore correct front suspension function and ride control.
When to Replace This Part
• The front shock absorbers are being replaced or serviced
• The additional spring is worn, split, compressed, damaged, or missing
• Front suspension knocks, harshness, or bottoming is present
• Suspension travel feels poorly controlled
• Strut top mounts, bump stops, or related components are being renewed
• The front suspension assembly has been removed
• Preventative replacement is being carried out during suspension overhaul.
Where it fits on the car
This additional spring fits on the front shock absorber / strut assembly on Porsche 997.1 and 997.2 models. It can be used on the left or right front shock where part number 99634330102 is specified.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99634330102
The product you are viewing cross references to these numbers
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche 997 MKII Turbo 2010-13
Front suspension strut bearing (upper damper mount bearing) for Porsche 911 (996 and 997 models) all-wheel drive (4WD) variants. This bearing enables smooth rotation and proper articulation of the front suspension strut assembly, reducing friction and maintaining correct alignment under load. Built to replicate the original equipment’s tolerances, materials and mounting geometry.
Sold each, fits left or right suspension strut
Fits:
Porsche 996 C4 / C4S 1998 - 2005
Porsche 996 Turbo 2001 - 2005
Porsche 997.1 C4 / C4S 2007- 2008
Porsche 997.1 Turbo 2007 - 2009
Porsche 997.2 C4 / C4S 2009 - 2012
Porsche 997.2 Turbo 2010 - 2013
Diagram ref no 11
• Position on Vehicle: Mounted at the top of the front suspension strut/damper assembly, under the front sub-frame, where it supports angular movement and load transfer through the bearing above the strut.
• Cross-Reference / Alternative Numbers: OEM number: 996 343 501 00 (sometimes shown as 99634350100)
• Applications: Replacement when the original front strut bearing shows signs of wear such as noise, binding, or play - restoring correct suspension articulation, reducing noise and preserving handling response.
The front strut top bearing is a key element in the suspension system - linking the strut to the chassis and allowing smooth turning and suspension travel. When the bearing becomes worn, loose or corroded, you may experience clunks, steering noise, compromised alignment or uneven tyre wear. Replacing it with a high-quality OE-Match unit restores silent, precise suspension behaviour and maintains the sophisticated ride and handling that Porsche drivers expect.
When and why to replace:
• Noticeable noise (clunking, groaning) when steering or traversing bumps through the front suspension.
• Excessive play or roughness at the top of the strut when the bonnet is open or during suspension movement.
• Uneven tyre wear or alignment issues traceable to front suspension bearing play.
• After front-end suspension work or damper/strut replacement - when access is available.
• High-mileage vehicle or original bearing installed long ago and potentially at end-of-life.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99634350100
The product you are viewing cross references to these numbers
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche 997 MKII Turbo 2010-13
Fits:
Porsche 996 C4 / C4S 1997 - 2005
Porsche 996 Turbo 1999 - 2005
Porsche 997.1 C4 / C4S 2005 - 2008
Porsche 997.2 C4 / C4S 2009 - 2012
Porsche 997.1 Turbo 2007 - 2009
Porsche 997.2 Turbo 2010 - 2013
Porsche 997 GT3 2010 - 2011
Diagram ref no 5
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99634350901
The product you are viewing cross references to these numbers
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